Jeweler&#39;s tool.



un. ss|,nao. Patented Aug. 2o, lem.

E. A. smouns. JEWELEBS TUUL.

(Application led Mar. 14. 1901.)

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UNITED STATES PATENT EETCE,

EDWIN A. SIMONDS, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO RIPLEY-I-IOWLAND MANUFACTURING COMPANY, OF BOSTON, MAS- SACHUSETTS.

JEWELERS TOOL.

SPECIFICATION forming part of Letters Patent No. 681,080, dated August 20, 1l901.

Application filed March 14,1901- Serial No. 51,084. (No model.)

.To all whom t may concern.-

Be it known that I, EDWIN A. SIMoNDs, a citizen of the United States, residing at Somerville, county of Suffolk, State of Massachusetts,have invented an Improvement in J ewelers Tools, of which the following descrip` tion, in connection with the accompanying drawings, is a specification, like numerals on the drawings representing like parts.

In the manufacture of finger-rings it is often desirableto stretch or enlarge a ring after it has been made, so as to increase the diameter thereof; and it is the object of my invention to provide a novel tool for accomplishing this result.

My tool comprises a pair of rolls, one of which is preferably smooth-surfaced and is `adapted to have a finger-ring slipped over the same, while the other roll has its surface shaped to fit the exterior surface of the ring.'

One of the rolls is mounted in movable bearings, and suitable adjusting devices are provided whereby the movable bearings may be adjusted to vary the distance between the rolls, so thatthe rolls may be separated sufciently to allow of the ring being slipped or inserted over the smooth-surfaced roll, when the adjusting devices may be operated to bring the rolls together, so as to grip the ring therebetween with any desired pressure. Suitable means are provided to rotate the rolls, and such rotation thereof will operate to roll or draw the ring, reducing the crosssectional area and thus enlarging the diameter thereof. The contiguous faces of the rolls are parallel, and the adjusting devices are so constructed as to maintain the constant parallelism of the said contiguous faces of the said rolls regardless of the distance between the rolls. The device therefore can be util` ized on rings of various sizes and of various cross-sectional areas.

Referring to the drawings, Figure 1 shows an end velevation of my improved tool. Fig. 2 is a side elevation with parts broken away. Figs. 3 and 4 `are details hereinafter to be described,and Fig. 5 is an enlarged view of the non-adjustable roll. s

The drawing-rolls between which the ring is rolled to reduce its cross-sectional area are 5o shown at 3 and 4, the said roll 3 being illustrated as a non-adjustable roll and 4 as an adjustable roll.

Preferably I support my rolls upon suitable shafts 5 and 6, the said shafts in this embodi- 55 ment of my invention being illustrated as parallel shafts and the shaft 5 being mounted in fixed bearings in a suitable` housing or frame 7, while the shaft 6 is adj ustably mounted therein, as hereinafter described.

The frame 7` may be of any usual shape, and, as illustrated, it has the depending lug 8, which may be gripped in a vise or held in any suitable socket in order to rigidly sustain the tool during its operation. The frame 65 has at each end upwardly-projecting arms 9 10, forming between them a suitable slot in which the bearing-block 11 for the adjustable shaft 6 is mounted for vertical movement, and a cap-plate12, secured to the arms in 7o any suitable way, as by screws 13, sustains the` adjusting devices, presently to be described, by means of which the position of the `adjustable roll is determined. The shafts which carry the two rolls may be rotated in 7 5 any suitable way, but I have herein shown the same as provided with the intermeshing gears 14 and 15, and the fixed or non--adj ustable shaft 5 will be provided with any suitable crank mechanism 16 by means of which 8o said shaft may be turned, the rotation thereof being` communicated to the adjustable shaft 6 by means of the gears 14 15.

The rolls 3 and 4 are mounted outside of the frame '7, so that the ring can be easily 85 put on or removed from the non-adjustable roll 3,and in this embodiment of my invention said roll 3 is integral with the shaft 5, the said shaft being projected beyond the frame 7 to form the said non-adjustable roll. It will be 9o obvious, however, that the said roll 3 might be a separate roll rigidly mounted on the shaft, if desired. The adjustable shaft 6 also projects beyond the frame 7 and detachably supports upon its projecting end the adjustable` roll 4, 95 the said roll being splined to the shaft, so as to rotate therewith, and being held in place on the shaft by the latch 18, which is pivoted tween.

in any suitable way toathe Vvframe 4Tand has 'a slot 19 to engage -a groove v2O in theA end of the shaft 6.

The adjustable roll 4t is illustrated as having on its periphery grooves 21 of different sizes and shapes to itthe Vexterior surface ot'` I shaft carried thereby being maintained 1n different sized and shaped rings.

In order that the ring may be rolled evenly, it is essential that the axes of the two rolls should always be perfectly parallel at any adjusted;

position, and I have therefore provided an adj usting device which coperates with the mov-- able bearing-block 11, which bearing-blockextends the full length of the frame, as shown, the said adjusting devices operating constantly to maintain the shafts in parallelism, although at the Sametime operatingito vary the distance between the shafts. The adjusting device is illustrated as .comprising two feed-screws 22 23, mounted in the .cap-1 plate 12 and engaging the upper side of the bearing-block 11 at opposite ends thereof,; thesaidscrew 22 bearing at its end against: the bearing-block and being supported in;

the cap-plate for longitudinal movement,

aresopposite inpitch, the feed-screw 23 being illustrated as havinga right-handed screwthread, "while the 4feed-screw 22 has a left-i handed screw-thread. The upper end ofeach` feed-screw has zkeyed thereto suitable gears 27 28, respectively, which gears mesh with` the .drive-gear `2%),.carried by'apin or post 30, suitably swiveled `in the cap-plate and preferablyA having arms 31 extending there` from forfthe convenientmanipulation there-v of. The feed-screw 22 has a flange 33 thereon, upon whichthegear 27 is supported, said gear being keyed tothe flange 33 by any suitable keys 60 and being held in lplace by a suitable nut 34cm-.the end of said Vfeedscrew. The

gear 28 isfprovided with a hub 35, which restsupion ,the.cap-plate, and the said feed-.screw 23 is 'hel'd from longitudinal movement, as above described, by means .of a flange 36 thereon, which engages a suitableshoulder-.on the under side of the cap-plate, a ynut 38 on the A'upper end of said feedscrew lserving to holdthesaid screw firmly inxposition.

The `operation of the device is as follows: Assumingthat tlre rolls are spread sufciently toadrnit of a ring being slipped over the roll 3 inFig. il, by turning the -spindlei30 to the right the `feed-screws-22 and 23 will each be turned fin the opposite direction, or to .the left, by means of the ,gears v29 27 28 thefeedscrew 22 being advanced downward through the capplate 12, and thus bringing togetherv the rolls 3 and 4 to clamp the ring .therebe- The feed-screw I23will, however, at

the same time force the right-hand end in interest of clearness of illustration.

Fig. 2 of thebearing-block 11` downward, and as thescrew-threads on the two feed-screws are of the same pitch and the gears 27 28 are of the same size the result will be that the bearing-block 11 will have a bodily movement `toward the fixed shaft, the movable constant parallelism with the ixed shaft, so that the rolls are brought to bear upon the -ring between the same with an even pressure.

The crank 16 is then manipulated to turn the -coperating rolls, the said rolls operating to reduce .the size of the cross-section of the ring, and thus enlarge the diameter of the When a ring which is to have a setting therein is to be enlarged in diameter, the rolls will 'merely be oscillated, so as to roll or reduce in cross-sectional area :that portion of 'the ring oppositethe setting. In rings withsettings .the thickness ofthe ring varies slightly from the point directlyoppo- Ysitethe setting, where it is thinnest, toa point adjacent .the setting, where itis thickest, and in order to compensate for this varying crosssectional area of the ring and cause the rolls as they are oscillated 'to bear on the ring vwith a uniform pressure at every point thereon I lpreferably `make my smooth-surfaced roll slightlyeccentric, (see'Fig. 5,) the :highest point of the roll being opposite the other roll when the handle is in the position Villustrated in Fig. 1. Inpractice the eccentricity of the roll 3 is so small vas to be hardly appreciable, for the -variation in the cross-sectional area of the ring at .different points is very slight, Aand in Fig. 5 theamount of eccentricity `is exaggerated somewhat vinthe With this construction andfassuming that the ring is placed between the rolls with its thinnest portion supported on the pointiof greatest eccentricity of the roll 3 it will be seen that as thecrank 16 is vibrated to oscillatethe rolls the distance between the contiguous faces of the rolls ywill vary slightly owingto the Veccentricity of the vsurface of theroll 3, such variation being just sufcient tocoinpensate for the variation inthe thickness of the ring. The pressure of the rollson the ring is therefore the same at every'point, and

`therewill be no shoulder made on the ring when the rolling or drawing yceases either side of the-setting. When it `is desired to remove the ring from between the rolls, the spindle 30is revolved in the opposite direction or Ato `the left, when the feed-screw 23 will operate to positively lift the right-hand end in Fig. 2 of the bearing-block 11, while the springs 40, which are seated'in suitable recesses inthe frame and bear againstthe under side of the bearing-block 11 (see Fig. 3') will operate to raise vthe left-hand end of the said bearing-block 1l as the feed-screw22 recedes.

It will thus beseen that I have provided a tool comprising a non-adjustable and an ad- Ioo IZO

justable roll, said adjustable roll being carried by an adjustable or movable bearingblock and adjusting devices which operate to separate or bring together the rolls, said adjusting devices operating to maintain the parallelism of the axis of the rolls in any adj usted position thereof.

The object of making the :roll 4L detachable o is so that different rolls having different- Io shaped grooves in their peripheries may be used as desired fordierent shapes of rings. It will be obvious that various changes may be `made in the construction of the device Without departing from the spirit of my invention-as, for instance, the detachable roll could be mounted upon the shaft 5 instead of upon the adjustable shaft. Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In an apparatus of the class described, a shaft mounted in fixed bearings and an eccentric smooth-surfaced roll supported thereon, said roll adapted to have a ring slipped over the same, a `parallel shaft mounted in movable bearings, a coperating roll secured to the end of the last-named shaft, said roll having a working face to t the exterior of the ring, and means to rotate said shafts in unison, the eccentricity of the smooth-surfaced roll being approximately equal to the difference in thickness of the ring at points directly opposite and adjacent to the setting, whereby as the shafts are rotated the distance between the adjacent surfaces of the rolls varies. i 2. In an apparatus of the class described, a o shaft mounted in fixed bearings and supporting at one end outside the bearings an eccentric smooth-surfaced roll,said roll adapted to have a ring slipped over the same and j the eecentricity of the roll being approximately equal to the difference in thickness of 1 the ring at points directly opposite and adjacent the setting, a parallel shaft mounted in movable bearings, a coperating roll detachably secured to said last-nam ed shaft, said detachable roll having a Working face to fit the exterior of the ring, means to rotate said shafts, and adjusting devices to vary at will the distance between the shafts, said adjustj ing devices operating to constantly maintain said shafts in parallelism.

3. In an apparatus of the class described, a frame, a pair of rolls mounted therein, one y of said rolls being adjustable, means to rotate said rolls, said adjustable roll being mounted in a single movable bearing-block o extending the length of the frame, a screw operating in saidframe and impinging at its end against the said bearing-block near one end thereof, a second screw engaging a screwthreaded socket in the other end of said bearj 1 ing-block, said last-named screw being held 1 65 against longitudinal movement, and means to turn the screws, whereby the movable bearing-block isimoved bodily to vary the distance between the rolls.

4. In an apparatus of the class described, a frame, a pair of shafts mounted therein for rotation, said shafts carrying rolls at their ends and outside the frame, one of said rolls being adapted to have a finger-ring slipped over the same, and the other rollbeing shaped to t the contour of the exterior of the ring, one of said shafts being mounted in a movable bearing block, means to rotate said shafts, a pair of feed-screws mounted in said frame and engaging said movable bearingblock, one of said screws being mounted in the frame for longitudinal movement, and impinging at its end against said bearingblock, and the other of said feed-screws being held against longitudinal movement, andengaging a screw-threaded socket in the said bearing-block, and means to turn said screws, whereby the distance between the rolls may bevaried, said screws operating to constantly maintain the shafts in parallelism.

5. I n an apparatus of the class described, a pair of shafts, means to turn the same, cooperating rolls mounted thereon, one of said shafts being mounted in a movable bearingblock, a pair of right and left feed-screws mounted in said frame, one of said screws being mounted in the frame for longitudinal movement, and bearing at its end against the movable bearing-block, and the other of said screws being held against longitudinal movement and engaging a screw-threaded socket in the said movable bearing-block, and means to simultaneously turn said screws in the same direction, whereby the distance between the cooperating rolls may be varied, and the faces of the rolls preserved in constant parallelisin.

6. In an apparatus of the class described, a frame, a pair of parallel shafts mounted therein, said shafts carrying coperating rolls, one of said shafts being supported in a movable bearing-block, a pair of right and left feed-screws mounted in said frame, one of said screws being mounted for longitudinal movement and bearing at its end against the movable bearing-block, the other of said screws being held against longitudinal movement and engaging a screw-threaded socket in the bearing-block, gears at the upper ends of said screws, and means to rotate said gears in the same direction, whereby the distance between the rolls may be adjusted at will and the parallelism of the faces of the rolls preserved.

7. In an apparatus of the class described, a pair of rolls having the contiguous portions of their faces parallel, one of said rolls having an eccentric face the eccentricity of said IOO IIO

face being approximately equal to the differ- Y.

ence in the .thickness of the ring at points directly opposite and adjacent the setting,

means to rotate said rolls in unison and adname to this specification in -therpresence-of justing devices for varying at will the distwo subscribing Witnesses. tance between the Worknvfaees of said rolls j said adjusting devices operating to maintain EDWIN A' SIMNDS 5 the operative portions of the faces of the rolls Vitnesses:

in pai'allelisin LOUIS C. SMITH,

In testimony whereof I have signed my JOHN C. EDWARDS. 

